Patent
US 9,734,980Graphene Serving as Cathode of X-Ray Tube and X-Ray Tube Thereof
KUI-YANG LI
US
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Atlas literature
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US 9,734,980Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an overall schematic structural view of a high-efficiency graphene cathode field emission X-ray tube of the present disclosure. [0017]
FIG. 2 is a schematic structural view of a cathode assembly of the present disclosure. [0018]
FIG. 3 is a cross-sectional view along A-A of a cathode of the present disclosure. [0019]
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
FIG. 5 is a photograph showing electrons of graphene electron source emitted from a top edge of the material. DETAILED DESCRIPTION [0021] A high-efficiency …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Previously Canceled) canceled
A high efficiency high efficiency graphene cathode field emission X-ray tube, comprising a cathode assembly, an anode assembly and a vacuum glass tube; wherein the anode assembly comprises an anode target, a Kovar ring and an anode handle, and the anode target is formed integral with the anode handle; in the high efficiency graphene cathode field emission X ray tube, a high voltage is introduced through the anode handle is used to introduce a high voltage, a graphene cathode is grounded via a Kovar stem, the graphene cathode emits electrons due to the a high voltage between an anode and a cathode making the graphene cathode emit electrons, a cathode head and a cathode shield [[are]] riveted into an equipotential body to serve as a gate electrode of the X- ray tube, wherein a voltage ranging from -2000v to +2000v [[is]] applied between the cathode head, the cathode shield and the graphene cathode [[to]] control the magnitude of electron emission, and the electrons [[are]] accelerated in a high-voltage electric field generated by the high voltage to bombard the anode target so as to generate X-rays; and a distance D 1 between the graphene cathode and a top surface of the cathode shield is 0.5- 2.5mm; a distance D₂ between the anode target and the cathode is 10 mm- 15 mm; and the highest voltage is larger than 150 KV wherein the graphene cathode has a high voltage endurance capability larger than 150KV.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode is a graphene cathode filament group deposited onto a separate nickel wire, or a graphene cathode deposited separately onto a surface of a nickel sheet.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode filament group is a single-layer graphene film, or a multilayer graphene array, or a vertical graphene array.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the emission threshold of the graphene highest withstand voltage is larger than 150 K V.
(Previously Canceled) 2/5 Attorney Docket No. LET AI -00007 Application No. 14/785,348 canceled
The high efficiency high efficiency graphene wherein rectangular grooves are provided on an artificial filament. 3/cathode is less than 0.40 V/bt m, and the cathode field emission X-ray tube of claim [[2]] 1 upper end of the cathode head for installation of
Layer stacks claimed or described, ordered top of device to substrate.
high efficiency graphene cathode field emission X-ray tube
Materials described outside the worked examples.
graphene cathode
nickel wire/nickel sheet substrate
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
emission threshold of graphene cathode | ≤ 0.4 V/μm | graphene cathode |
graphene cathode highest withstand voltage | ≥ 150 kV |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,734,980Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an overall schematic structural view of a high-efficiency graphene cathode field emission X-ray tube of the present disclosure. [0017]
FIG. 2 is a schematic structural view of a cathode assembly of the present disclosure. [0018]
FIG. 3 is a cross-sectional view along A-A of a cathode of the present disclosure. [0019]
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
FIG. 5 is a photograph showing electrons of graphene electron source emitted from a top edge of the material. DETAILED DESCRIPTION [0021] A high-efficiency …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Previously Canceled) canceled
A high efficiency high efficiency graphene cathode field emission X-ray tube, comprising a cathode assembly, an anode assembly and a vacuum glass tube; wherein the anode assembly comprises an anode target, a Kovar ring and an anode handle, and the anode target is formed integral with the anode handle; in the high efficiency graphene cathode field emission X ray tube, a high voltage is introduced through the anode handle is used to introduce a high voltage, a graphene cathode is grounded via a Kovar stem, the graphene cathode emits electrons due to the a high voltage between an anode and a cathode making the graphene cathode emit electrons, a cathode head and a cathode shield [[are]] riveted into an equipotential body to serve as a gate electrode of the X- ray tube, wherein a voltage ranging from -2000v to +2000v [[is]] applied between the cathode head, the cathode shield and the graphene cathode [[to]] control the magnitude of electron emission, and the electrons [[are]] accelerated in a high-voltage electric field generated by the high voltage to bombard the anode target so as to generate X-rays; and a distance D 1 between the graphene cathode and a top surface of the cathode shield is 0.5- 2.5mm; a distance D₂ between the anode target and the cathode is 10 mm- 15 mm; and the highest voltage is larger than 150 KV wherein the graphene cathode has a high voltage endurance capability larger than 150KV.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode is a graphene cathode filament group deposited onto a separate nickel wire, or a graphene cathode deposited separately onto a surface of a nickel sheet.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode filament group is a single-layer graphene film, or a multilayer graphene array, or a vertical graphene array.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the emission threshold of the graphene highest withstand voltage is larger than 150 K V.
(Previously Canceled) 2/5 Attorney Docket No. LET AI -00007 Application No. 14/785,348 canceled
The high efficiency high efficiency graphene wherein rectangular grooves are provided on an artificial filament. 3/cathode is less than 0.40 V/bt m, and the cathode field emission X-ray tube of claim [[2]] 1 upper end of the cathode head for installation of
Layer stacks claimed or described, ordered top of device to substrate.
high efficiency graphene cathode field emission X-ray tube
Materials described outside the worked examples.
graphene cathode
nickel wire/nickel sheet substrate
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
emission threshold of graphene cathode | ≤ 0.4 V/μm | graphene cathode |
graphene cathode highest withstand voltage | ≥ 150 kV |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,734,980Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an overall schematic structural view of a high-efficiency graphene cathode field emission X-ray tube of the present disclosure. [0017]
FIG. 2 is a schematic structural view of a cathode assembly of the present disclosure. [0018]
FIG. 3 is a cross-sectional view along A-A of a cathode of the present disclosure. [0019]
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
FIG. 5 is a photograph showing electrons of graphene electron source emitted from a top edge of the material. DETAILED DESCRIPTION [0021] A high-efficiency …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Previously Canceled) canceled
A high efficiency high efficiency graphene cathode field emission X-ray tube, comprising a cathode assembly, an anode assembly and a vacuum glass tube; wherein the anode assembly comprises an anode target, a Kovar ring and an anode handle, and the anode target is formed integral with the anode handle; in the high efficiency graphene cathode field emission X ray tube, a high voltage is introduced through the anode handle is used to introduce a high voltage, a graphene cathode is grounded via a Kovar stem, the graphene cathode emits electrons due to the a high voltage between an anode and a cathode making the graphene cathode emit electrons, a cathode head and a cathode shield [[are]] riveted into an equipotential body to serve as a gate electrode of the X- ray tube, wherein a voltage ranging from -2000v to +2000v [[is]] applied between the cathode head, the cathode shield and the graphene cathode [[to]] control the magnitude of electron emission, and the electrons [[are]] accelerated in a high-voltage electric field generated by the high voltage to bombard the anode target so as to generate X-rays; and a distance D 1 between the graphene cathode and a top surface of the cathode shield is 0.5- 2.5mm; a distance D₂ between the anode target and the cathode is 10 mm- 15 mm; and the highest voltage is larger than 150 KV wherein the graphene cathode has a high voltage endurance capability larger than 150KV.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode is a graphene cathode filament group deposited onto a separate nickel wire, or a graphene cathode deposited separately onto a surface of a nickel sheet.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode filament group is a single-layer graphene film, or a multilayer graphene array, or a vertical graphene array.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the emission threshold of the graphene highest withstand voltage is larger than 150 K V.
(Previously Canceled) 2/5 Attorney Docket No. LET AI -00007 Application No. 14/785,348 canceled
The high efficiency high efficiency graphene wherein rectangular grooves are provided on an artificial filament. 3/cathode is less than 0.40 V/bt m, and the cathode field emission X-ray tube of claim [[2]] 1 upper end of the cathode head for installation of
Layer stacks claimed or described, ordered top of device to substrate.
high efficiency graphene cathode field emission X-ray tube
Materials described outside the worked examples.
graphene cathode
nickel wire/nickel sheet substrate
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
emission threshold of graphene cathode | ≤ 0.4 V/μm | graphene cathode |
graphene cathode highest withstand voltage | ≥ 150 kV |
Related documents with shared materials, methods, properties, or citations.
Patent
Atlas literature
Patent
US 9,734,980Patent drawings and their descriptions. Click a drawing to enlarge it.
FIG. 1 is an overall schematic structural view of a high-efficiency graphene cathode field emission X-ray tube of the present disclosure. [0017]
FIG. 2 is a schematic structural view of a cathode assembly of the present disclosure. [0018]
FIG. 3 is a cross-sectional view along A-A of a cathode of the present disclosure. [0019]
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
FIG. 5 is a photograph showing electrons of graphene electron source emitted from a top edge of the material. DETAILED DESCRIPTION [0021] A high-efficiency …
Claims define the patent's legal scope. Independent claims stand alone; dependent claims (nested) narrow them. Click a claim to expand its dependents.
(Previously Canceled) canceled
A high efficiency high efficiency graphene cathode field emission X-ray tube, comprising a cathode assembly, an anode assembly and a vacuum glass tube; wherein the anode assembly comprises an anode target, a Kovar ring and an anode handle, and the anode target is formed integral with the anode handle; in the high efficiency graphene cathode field emission X ray tube, a high voltage is introduced through the anode handle is used to introduce a high voltage, a graphene cathode is grounded via a Kovar stem, the graphene cathode emits electrons due to the a high voltage between an anode and a cathode making the graphene cathode emit electrons, a cathode head and a cathode shield [[are]] riveted into an equipotential body to serve as a gate electrode of the X- ray tube, wherein a voltage ranging from -2000v to +2000v [[is]] applied between the cathode head, the cathode shield and the graphene cathode [[to]] control the magnitude of electron emission, and the electrons [[are]] accelerated in a high-voltage electric field generated by the high voltage to bombard the anode target so as to generate X-rays; and a distance D 1 between the graphene cathode and a top surface of the cathode shield is 0.5- 2.5mm; a distance D₂ between the anode target and the cathode is 10 mm- 15 mm; and the highest voltage is larger than 150 KV wherein the graphene cathode has a high voltage endurance capability larger than 150KV.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode is a graphene cathode filament group deposited onto a separate nickel wire, or a graphene cathode deposited separately onto a surface of a nickel sheet.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the graphene cathode filament group is a single-layer graphene film, or a multilayer graphene array, or a vertical graphene array.
The high efficiency high efficiency graphene cathode field emission X-ray tube of claim 2, wherein the emission threshold of the graphene highest withstand voltage is larger than 150 K V.
(Previously Canceled) 2/5 Attorney Docket No. LET AI -00007 Application No. 14/785,348 canceled
The high efficiency high efficiency graphene wherein rectangular grooves are provided on an artificial filament. 3/cathode is less than 0.40 V/bt m, and the cathode field emission X-ray tube of claim [[2]] 1 upper end of the cathode head for installation of
Layer stacks claimed or described, ordered top of device to substrate.
high efficiency graphene cathode field emission X-ray tube
Materials described outside the worked examples.
graphene cathode
nickel wire/nickel sheet substrate
Additional fabrication and treatment steps described in the patent.
Measurements and analyses referenced in the patent, with their drawing references.
FIG. 4, the cathode assembly 3 comprises a cathode head 4, a cathode shield 6, a glass stem 5, a cathode base 10, a graphene cathode 11, an artificial filament …
Performance values and ranges asserted in the specification or claims.
| Property | Value | Material |
|---|---|---|
emission threshold of graphene cathode | ≤ 0.4 V/μm | graphene cathode |
graphene cathode highest withstand voltage | ≥ 150 kV |
Related documents with shared materials, methods, properties, or citations.
graphene
molybdenum (Mo) rods
Mo
Kovar stems
anode target
service life of graphene cathode field emission X-ray tube | ≥ 2000 h | graphene cathode |
Voltage | 4–5 v | — |
Voltage | ≤ 0.4 V | — |
Thickness | 0.5–2.5 mm | — |
METHOD FOR GROWTH OF HIGH QUALITY GRAPHENE FILMS
graphene
molybdenum (Mo) rods
Mo
Kovar stems
anode target
service life of graphene cathode field emission X-ray tube | ≥ 2000 h | graphene cathode |
Voltage | 4–5 v | — |
Voltage | ≤ 0.4 V | — |
Thickness | 0.5–2.5 mm | — |
METHOD FOR GROWTH OF HIGH QUALITY GRAPHENE FILMS
graphene
molybdenum (Mo) rods
Mo
Kovar stems
anode target
service life of graphene cathode field emission X-ray tube | ≥ 2000 h | graphene cathode |
Voltage | 4–5 v | — |
Voltage | ≤ 0.4 V | — |
Thickness | 0.5–2.5 mm | — |
METHOD FOR GROWTH OF HIGH QUALITY GRAPHENE FILMS
graphene
molybdenum (Mo) rods
Mo
Kovar stems
anode target
service life of graphene cathode field emission X-ray tube | ≥ 2000 h | graphene cathode |
Voltage | 4–5 v | — |
Voltage | ≤ 0.4 V | — |
Thickness | 0.5–2.5 mm | — |